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ED STA OFFICE.

RAPHAEL BENNETT ANB ALVAH E. BLANCHARD, F PRESQUE ISLE, MAINE.

ILLUMINATED LEVEL. v

Specification of Letters Patent.

lPatented Aug. A8, 1916.

Application filed September 22, 1914. VSerial No. 863,0Z-37.

T 0 all Awhom it may concern:

Be it known thatwe, RAPHAEL BENNm'r and Amari E. BLANCHARD, citizens of the United States, residing at Presque Isle, in the county of Aroostook, State of Maine, have invented certain new and useful 1m provenients in Illuminated Levels; and we do hereby declare the following to be a full, clear.l and exact description of the invention, snch as will enable others skilled in the art to which it appertains to'malce and use the same. Y

This invent-ion relates to indicating devices, particularly to levelsfor the use of carpenters and others` and has for its object the. provision of a level provided with electric lamps adapted when energized to throw light: through the spirit level for making the bubble clearly visible when the level is used in dark places.

.Xn important object iS the provision ot a level provided with electric lights and furi'hcr provided with a control switch whereby the light may be shown through the level and the plumb gage.

A further object is the provision of a device. of this character which will be simple vand inexpensive in iii.anut`;u'ture, efficient and durablein usc`r and a general iinprovenient of the art.

Vith tht-se and othenobjects and advantages in vif-nv, the invention consists in the novel construction and arrangement of parts as will be hereinafter more fully described and claimed, and illustrated in the accom panving drawing. in which' Figure 1 is a side elevation of our novel level. llig. Z a vertical sectional View therethrough. Fig. El is a horizontal sectional view taken centrally through-the interme diate portion of the level, and Fig. 4 is a vertical cross sectional View taken through the central portion of the level.

Referring more particularly to the drawing the numeral 5 designates the casingr of our device. which maybe of wood and of the ordinary shape. and size. Adjacent one end the casing 5 is cutaway as shown at (E and llas a plumb gage 7 disposed so as to have its i-ubble S visible through the opening C. Upon the upper face ofthe central portiony the casing 5 is provided with the usual spirit level il having the bubble 10 and protected by the usual plate 11. These parts are all well known and of the ordinaryconstrnced end of an incandescent lamp 14 which is positioned below the level 9. A bracket 1" 1S mounted below the member 12 and goil)- tarts with the button upon the end of tite lamp 14. A tubular membervlisdisposet' within the casing 5 audis connected with the member l2 and has screw threaded engagcment at its outer end with an incandescent lamp 17 disposed adjacent the plumb gage T.

ln order that either of thelanlps 14 or 17 ma)v be energized, we provide a batteryv 1S disposed within a recess lll in theotller end 'ofthe casing 5 having its terminals 15)" contacting with fixed contacts 20 and 21 secured within the recess 1i). The recess is closed by aV plate 22. The stationary contact Z0 is connectcd by a wire 23 with the member 12.

in order that either lamp may be onergized we provide. push buttons 21 and 25 passing through a' `late 211i secured over the. central recess ir lcasing. A spring arm 27 is secured as t S upon and insulated push button 25. The arm 30 has a wire -ll i connected therewith which is connected with the, contact button upon the end of the lamp,17-.

lt 'it is desired to show the light below the. level it is merelyI necessary to press upon the push button 24 whereupon the arm 27 will `Contact. with the bracket 15 thus completin g a circuit from the Contact 20 through the member 12, lamp 14. bracket 15, arm 27 and the contact 21'. As' long as the push button 2l is depressed the lamp 14 will be energized. 1n order to show a light back of the plumb gage 7 it is merely necessary to press upon the push button 25, whereupon the arm 30 will Contact with the arm 27 and cause current to fiow throughthe Contact 20, member 12, tubular member 16, lamp 17, wire 33, arm 30, arm '27, and the wire connecting-the arm` 27 with the Contact *21.

From the foregoingr description and a.

v study of' the drawing i' will tlms be apparent that we have provided u novel and simple level' and plumb gage in which the indicating bubble may be visible when the device is used in darleplaces, by merely press` i ing upon a push button` The use of this -used as a search device makes the operators work more accurate as there is no guess work in regard to the position of the bubble.v The device also obviates the necessity for striking matches to see the position of the bubble, striking ,of matches beingextremely dangerous' wherethere are shavings as in curpenter work. 'Itwill also be obvious that in' Having thus described our invention, we claim:

The combination with a easingllaving a spirit level and plmnb gage therein, of a metallic member within said asing extended adjacent said level and gage, incandescent lamps engaged with and carried by said member -and disposed adjacent said level and gage, a member engageable by one contact of one of the lamps, an insulated Spring finger mounted in the` casing, means for moving it to engage said last member, a second spring finger engageable with the first finger, means for moving it to such 'engagement and a source of electrical energy, u connection between said source of energy and the metallic member, a connection between'said source of energv and the first named finger and a connection'between the second named finger and the other of said lumps.

In testimony whereof, we afiix our signatures in the presence of two witnesses.

"itnesses B. MARKS, C. lV. DAVIS. 

